DC-DC converter with strong anti-interference capability

Abstract

The invention discloses a DC-DC converter with relatively high anti-interference capability. The DC-DC converter comprises a lightning stroke surge protection device, an electromagnetic pulse protection device EMP, a surge suppressor, an EMI filter and a voltage conversion circuit which are electrically connected together, wherein the lightning surge protector comprises a piezoresistor, a gas discharge tube G1, an inductor and a TVS tube SMDJ110CA which are electrically connected together, the electromagnetic pulse protector EMP comprises two TVS (transient voltage suppressor) tubes of a bidirectional BV-SMBT-15CA (bidirectional BV-SMBT-15CA), the surge suppressor comprises a TVS tube SMCJ150A D3, a TVS tube SMCJ150A D4, an MOS tube and a surge suppression chip which are electrically connected together, the EMI filter comprises a common-mode inductor, a differential-mode inductor, an X filter capacitor and a Y filter capacitor which are electrically connected together, and the voltageconversion circuit comprises a power supply control chip, a transformer, an MOS transistor and a feedback loop which are electrically connected together. Compared with the prior art, the DC-DC converter has advantages of lightning protection, surge resistance, electromagnetic pulse interference suppression, EMI filtering and the like, and can be applied to complex electromagnetic environments.

Description

technical field [0001] The invention relates to the technical field, in particular to a DC-DC converter with strong anti-interference ability. Background technique [0002] Complex electromagnetic environment, that is, the complex electromagnetic environment of electronic information systems. Complex electromagnetic environment includes lightning surge (1.2 / 50us lightning voltage surge, 8 / 20us lightning current), electromagnetic pulse EMP interference, ±600V / 10us overvoltage peak and 80V / 50ms overvoltage surge, EMI noise and other electromagnetic overlay of the environment. DC-DC converter, that is, a voltage converter that effectively outputs a fixed voltage after changing the input voltage. In the process of working, the DC-DC converter needs to have anti-interference and suppression ability to the complex electromagnetic environment. The DC-DC converter in the prior art can realize a certain voltage on the basis of converting the input voltage into a fixed voltage outpu...

AI Technical Summary

Problems solved by technology

In the process of working, the DC-DC converter needs to have anti-interference and suppression ability to the complex electromagnetic environment. The DC-DC converter in the prior art can convert the input voltage into a fixed voltage output, and can achieve a certain This kind of electromagnetic environment has anti-interference and suppression capabilities, such as surge suppression or EMI filtering, but it does not have the ability to resist and suppress complex electromagnetic environments.

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